diff --git a/app/controllers/search_controller.rb b/app/controllers/search_controller.rb
index 0fa3af35c..25946bf47 100644
--- a/app/controllers/search_controller.rb
+++ b/app/controllers/search_controller.rb
@@ -34,7 +34,7 @@ class SearchController < ApplicationController
       next if !preferences
       objects_in_order_hash[preferences[:prio]] = object
     }
-    objects_in_order_hash.keys.sort.reverse.each {|prio|
+    objects_in_order_hash.keys.sort.reverse_each {|prio|
       objects_in_order.push objects_in_order_hash[prio]
     }
 
diff --git a/app/models/user_device.rb b/app/models/user_device.rb
index 858d7813e..094597c17 100644
--- a/app/models/user_device.rb
+++ b/app/models/user_device.rb
@@ -46,7 +46,7 @@ store device for user
     end
 
     # get browser details
-    browser = Browser.new(:ua => user_agent, :accept_language => 'en-us')
+    browser = Browser.new(ua: user_agent, accept_language: 'en-us')
     browser = {
       plattform: browser.platform.to_s.camelize,
       name: browser.name,
@@ -73,7 +73,7 @@ store device for user
     end
 
     # check if exists
-    user_device = self.find_by(
+    user_device = find_by(
       user_id: user_id,
       os: browser[:plattform],
       browser: browser[:name],
@@ -85,7 +85,7 @@ store device for user
     end
 
     # create new device
-    user_device = self.create(
+    user_device = create(
       user_id: user_id,
       name: name,
       os: browser[:plattform],
@@ -120,7 +120,7 @@ log user device action
 
 =end
 
-  def self.action(user_device_id, user_agent, ip, user_id)
+  def self.action(user_device_id, _user_agent, ip, _user_id)
     user_device = UserDevice.find(user_device_id)
 
     # update location if needed
diff --git a/lib/models.rb b/lib/models.rb
index c798a9aaa..ea73526a1 100644
--- a/lib/models.rb
+++ b/lib/models.rb
@@ -64,7 +64,7 @@ returns
 
   def self.searchable
     models = []
-    all.each {|model_class, options|
+    all.each {|model_class, _options|
       next if !model_class
       next if !model_class.respond_to? :search_preferences
       models.push model_class
diff --git a/test/controllers/search_controller_test.rb b/test/controllers/search_controller_test.rb
index 760241ae4..ebe6e18b8 100644
--- a/test/controllers/search_controller_test.rb
+++ b/test/controllers/search_controller_test.rb
@@ -452,5 +452,4 @@ class SearchControllerTest < ActionDispatch::IntegrationTest
 
   end
 
-
 end
diff --git a/test/unit/user_device_test.rb b/test/unit/user_device_test.rb
index 8d61e9888..7565fa328 100644
--- a/test/unit/user_device_test.rb
+++ b/test/unit/user_device_test.rb
@@ -21,7 +21,6 @@ class UserDeviceTest < ActiveSupport::TestCase
     )
   end
 
-
   test 'session test' do
 
     # signin with fingerprint A from country A via session -> new device #1
@@ -186,5 +185,4 @@ class UserDeviceTest < ActiveSupport::TestCase
 
   end
 
-
 end